Retrieval of land surface albedo and temperature using data from the Indian geostationary satellite: a case study for the winter months

2009 ◽  
Vol 30 (12) ◽  
pp. 3239-3257 ◽  
Author(s):  
B. K. Bhattacharya ◽  
K. Mallick ◽  
N. Padmanabhan ◽  
N. K. Patel ◽  
J. S. Parihar
Keyword(s):  
Land Surface ◽  
Surface Albedo ◽  
Geostationary Satellite ◽  
Using Data

scholarly journals Trends in entropy production during ecosystem development in the Amazon Basin

2010 ◽  
Vol 365 (1545) ◽  
pp. 1437-1447 ◽  
Author(s):  
Robert J. Holdaway ◽  
Ashley D. Sparrow ◽  
David A. Coomes
Keyword(s):  
Entropy Production ◽  
Land Surface ◽  
Amazon Basin ◽  
Surface Albedo ◽  
Canopy Structure ◽  
Lower Surface ◽  
Forest Sites ◽  
Using Data ◽  
Principle Of Maximum ◽  
Potential Transpiration

Understanding successional trends in energy and matter exchange across the ecosystem–atmosphere boundary layer is an essential focus in ecological research; however, a general theory describing the observed pattern remains elusive. This paper examines whether the principle of maximum entropy production could provide the solution. A general framework is developed for calculating entropy production using data from terrestrial eddy covariance and micrometeorological studies. We apply this framework to data from eight tropical forest and pasture flux sites in the Amazon Basin and show that forest sites had consistently higher entropy production rates than pasture sites (0.461 versus 0.422 W m −2 K −1 , respectively). It is suggested that during development, changes in canopy structure minimize surface albedo, and development of deeper root systems optimizes access to soil water and thus potential transpiration, resulting in lower surface temperatures and increased entropy production. We discuss our results in the context of a theoretical model of entropy production versus ecosystem developmental stage. We conclude that, although further work is required, entropy production could potentially provide a much-needed theoretical basis for understanding the effects of deforestation and land-use change on the land-surface energy balance.

A case study of global ULF pulsations using data from space-borne and ground-based magnetometers and a SuperDARN radar

2011 ◽  
Vol 17 (6) ◽  
pp. 54-67
Author(s):  
A.S. Potapov ◽  
◽  
E. Amata ◽  
T.N. Polyushkina ◽  
I. Coco ◽  
...  
Keyword(s):  
Using Data
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